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Grid/Hadrons/Modules/MContraction/WeakEye3pt.hpp

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/*************************************************************************************
Grid physics library, www.github.com/paboyle/Grid
Source file: Hadrons/Modules/MContraction/WeakEye3pt.hpp
Copyright (C) 2015-2019
Author: Antonin Portelli <antonin.portelli@me.com>
Author: Lanny91 <andrew.lawson@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
See the full license in the file "LICENSE" in the top level distribution directory
*************************************************************************************/
/* END LEGAL */
#ifndef Hadrons_MContraction_WeakEye3pt_hpp_
#define Hadrons_MContraction_WeakEye3pt_hpp_
#include <Hadrons/Global.hpp>
#include <Hadrons/Module.hpp>
#include <Hadrons/ModuleFactory.hpp>
BEGIN_HADRONS_NAMESPACE
/*
* Weak Hamiltonian meson 3-pt diagrams, eye topologies.
*
* Schematics: loop |
* /-<-¬ |
* / \ | qbl G qbr
* \ / | /----<------*------<----¬
* qbl \ / qbr | / /-*-¬ \
* /-----<-----* *-----<----¬ | / / G \ \
* gIn * G G * gOut | gIn * \ / loop * gOut
* \ / | \ \->-/ /
* \ / | \ /
* \---------->---------/ | \----------->----------/
* qs | qs
* |
* one trace | two traces
*
* one trace : tr(qbr*gOut*qs*adj(gIn)*g5*adj(qbl)*g5*G*loop*G)
* two traces: tr(qbr*gOut*qs*adj(gIn)*g5*adj(qbl)*g5*G)*tr(loop*G)
*
*/
BEGIN_MODULE_NAMESPACE(MContraction)
class WeakEye3ptPar: Serializable
{
public:
GRID_SERIALIZABLE_CLASS_MEMBERS(WeakEye3ptPar,
std::string, qBarLeft,
std::string, qBarRight,
std::string, qSpectator,
std::string, loop,
unsigned int, tOut,
Gamma::Algebra, gammaIn,
Gamma::Algebra, gammaOut,
std::string, output);
};
template <typename FImpl>
class TWeakEye3pt: public Module<WeakEye3ptPar>
{
public:
FERM_TYPE_ALIASES(FImpl,);
class Metadata: Serializable
{
public:
GRID_SERIALIZABLE_CLASS_MEMBERS(Metadata,
Gamma::Algebra, in,
Gamma::Algebra, out,
Gamma::Algebra, op,
unsigned int, trace);
};
typedef Correlator<Metadata> Result;
public:
// constructor
TWeakEye3pt(const std::string name);
// destructor
virtual ~TWeakEye3pt(void) {};
// dependency relation
virtual std::vector<std::string> getInput(void);
virtual std::vector<std::string> getOutput(void);
// setup
virtual void setup(void);
// execution
virtual void execute(void);
};
MODULE_REGISTER_TMP(WeakEye3pt, TWeakEye3pt<FIMPL>, MContraction);
/******************************************************************************
* TWeakEye3pt implementation *
******************************************************************************/
// constructor /////////////////////////////////////////////////////////////////
template <typename FImpl>
TWeakEye3pt<FImpl>::TWeakEye3pt(const std::string name)
: Module<WeakEye3ptPar>(name)
{}
// dependencies/products ///////////////////////////////////////////////////////
template <typename FImpl>
std::vector<std::string> TWeakEye3pt<FImpl>::getInput(void)
{
std::vector<std::string> in = {par().qBarLeft, par().qBarRight,
par().qSpectator, par().loop};
return in;
}
template <typename FImpl>
std::vector<std::string> TWeakEye3pt<FImpl>::getOutput(void)
{
std::vector<std::string> out = {};
return out;
}
// setup ///////////////////////////////////////////////////////////////////////
template <typename FImpl>
void TWeakEye3pt<FImpl>::setup(void)
{
envTmpLat(ComplexField, "corr");
}
// execution ///////////////////////////////////////////////////////////////////
template <typename FImpl>
void TWeakEye3pt<FImpl>::execute(void)
{
LOG(Message) << "Computing mesonic weak 3pt contractions, eye topologies" << std::endl;
LOG(Message) << "gIn : " << par().gammaIn << std::endl;
LOG(Message) << "gOut: " << par().gammaIn << std::endl;
LOG(Message) << "tOut: " << par().tOut << std::endl;
LOG(Message) << "qbl : " << par().qBarLeft << std::endl;
LOG(Message) << "qbr : " << par().qBarRight << std::endl;
LOG(Message) << "qs : " << par().qSpectator << std::endl;
LOG(Message) << "loop: " << par().loop << std::endl;
std::vector<Result> result;
Result r;
auto &qbl = envGet(PropagatorField, par().qBarLeft);
auto &qbr = envGet(PropagatorField, par().qBarRight);
auto &loop = envGet(PropagatorField, par().loop);
auto &qs = envGet(SlicedPropagator, par().qSpectator);
auto qst = qs[par().tOut];
Gamma gIn(par().gammaIn), gOut(par().gammaOut);
Gamma g5(Gamma::Algebra::Gamma5);
envGetTmp(ComplexField, corr);
r.info.in = par().gammaIn;
r.info.out = par().gammaOut;
for (auto &G: Gamma::gall)
{
SlicedComplex buf;
r.info.op = G.g;
// one trace
corr = trace(qbr*gOut*qst*adj(gIn)*g5*adj(qbl)*g5*G*loop*G);
sliceSum(corr, buf, Tp);
r.corr.clear();
for (unsigned int t = 0; t < buf.size(); ++t)
{
r.corr.push_back(TensorRemove(buf[t]));
}
r.info.trace = 1;
result.push_back(r);
// two traces
corr = trace(qbr*gOut*qst*adj(gIn)*g5*adj(qbl)*g5*G)*trace(loop*G);
sliceSum(corr, buf, Tp);
r.corr.clear();
for (unsigned int t = 0; t < buf.size(); ++t)
{
r.corr.push_back(TensorRemove(buf[t]));
}
r.info.trace = 2;
result.push_back(r);
}
saveResult(par().output, "weakEye3pt", result);
}
END_MODULE_NAMESPACE
END_HADRONS_NAMESPACE
#endif // Hadrons_MContraction_WeakEye3pt_hpp_
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